Key parameters at a glance

A radius of 11.58 Earth radii
A mass of 2,129.45 Earth masses
Surface gravity around 15.88 g
An orbital period of 328.240 days
Semi-major axis 0.8980 AU
Equilibrium temperature 251 K (-22 °C)
Distance from Earth 2,376.13 light-years
Earth Similarity Index 0.471
Travel time at Voyager 1 speed 41,903,015 years

Context from the literature

Kepler-553 is a star in the northern constellation of Cygnus, approximately 2,430 light-years from the Solar System. It is a G-type subgiant that hosts two known exoplanets.

Excerpted from Wikipedia · full article

1 sibling around Kepler-553

Kepler-553 c shares its host star with 1 other confirmed planet. Side-by-side measurements below.

Planet	Type	Radius (R⊕)	Mass (M⊕)	Period (d)	Eq. T (K)	Year
Kepler-553 b	Neptune-like	4.74	116.01	4.030	1,089	2016
Kepler-553 c this	Gas Giant	11.58	2,129.45	328.240	251	2016

Kepler-553 c Planet Profile

Physical Specs

Radius

11.58 R⊕

Radius (Jupiter)

1.033 R♃

Mass

2,129.45 M⊕

Mass (Jupiter)

6.700 M♃

Density

7.53 g/cm³

Surface Gravity

15.88 g (Earth)

Classification

Planet Type

Gas Giant

ESI Score 0.471

HZ Position Habitable

Controversial No

Discovery

Year 2016

Method Transit

Facility Kepler

Telescope 0.95 m Kepler Telescope

Size rank in cohort

Rank by radius

#1581of 1771

top 89.2%

This planet

11.58R⊕

Gas Giant median

13.52R⊕

Nearest-size peers

TOI-6303 b 11.59 R⊕ HD 80606 b 11.57 R⊕ HATS-74 A b 11.57 R⊕

Metric	Earth	Kepler-553 c	Jupiter
Radius (R⊕)	1.00	11.58	11.21
Mass (M⊕)	1.00	2,129.45	317.83
Density (g/cm³)	5.51	7.53	1.33
Surface Gravity (g)	1.00	15.88	2.53
Insolation (S⊕)	1.00	0.59	0.037

Alternative Mass Estimates

Method	Value	Interpretation
Best measured mass	2,129.450 M⊕	Direct mass measurement (not derived).

Star Catalogue Identifiers

TIC

TIC 264508613

Gaia DR2

Gaia DR2 2086498312157538688

Gaia DR3

Gaia DR3 2086498312157538688

System

Kepler-553

Percentile among Gas Giant cohort

Radius 11.579 R⊕ · percentile 11 / cohort 1771

Mass 2,129.450 M⊕ · percentile 81 / cohort 1747

Orbital period 328.24 d · percentile 61 / cohort 1533

Distance 728.53 pc · percentile 82 / cohort 1759

ESI 0.471 · percentile 100 / cohort 1771

Orbit & Habitability

Orbital Dynamics

Period

328.240 days

Semi-major axis

0.8980 AU

Eccentricity

0.346

Inclination

89.83 °

Year Length

A year here lasts approximately 328.24 Earth days (89.9% of a terrestrial year) on a highly eccentric trajectory at a mean orbital distance of 0.8980 AU.

Transit Fingerprint

Depth

1.387 %

Duration

12.250 h

Impact parameter b

0.751

Rp / R★

0.117780

Transit midpoint (BJD)

2,455,032.1977

Photometric dip

Transit produces a flux drop of 13,870 ppm lasting ≈ 12.25 h.

Extended Orbital Architecture

Planet / star radius ratio

0.117780

Semi-major axis / stellar radius

214.800

Impact parameter (b)

0.751

RV semi-amplitude (K)

226.000 m/s

Transit mid-time (BJD)

2,455,032.1977

Long. of periastron (ω)

-48.20°

Angular separation (arcsec)

1.23000

Eq. Temperature

251K

(-22 °C)

Insolation (S⊕)

0.59

Earth = 1.00

Earth Similarity (ESI)

0.471

0 = alien, 1 = Earth-identical

Within the conservative habitable zone — surface water would be frozen.

Detection Signatures

Transit photometry

A transit dip has been observed from at least one telescope.

Radial velocity

Stellar wobble has been measured spectroscopically.

Discovery Paper

Primary reference

Morton et al. 2016

Instrument

Kepler CCD Array

Publication

2016-05

Observation locale

Space

Discovery cohort

Planets confirmed in 2016 at Kepler (12 shown).

Kepler-1512 b · Rocky Terrestrial Kepler-1410 b · Super-Earth Kepler-560 b · Super-Earth Kepler-1389 b · Super-Earth Kepler-1450 b · Super-Earth Kepler-1544 b · Super-Earth Kepler-1459 b · Super-Earth Kepler-1638 b · Super-Earth Kepler-737 b · Super-Earth Kepler-1185 b · Super-Earth Kepler-1178 b · Rocky Terrestrial Kepler-1040 b · Sub-Neptune

Host System: Kepler-553

Spectral Class

K-type orange

Effective Temperature

5,191 K — cooler than the Sun (5,778 K)

Estimated Age

8.80 Gyr — older than the Sun (4.6 Gyr)

Stellar Radius

0.902 R☉

Stellar Mass

0.889 M☉

Metallicity [Fe/H]

0.15

Extended Stellar Properties

Surface gravity (log g)

4.480 dex

Stellar density

1.727 g/cm³

Metallicity ratio

[Fe/H]

Distance

728.53 parsec

Light-years 2,376.13 ly

V-band magnitude

15.03 mag

Voyager-speed travel 41,903,015 yr

Multi-band Host Photometry — 16 bands

Astrometric Data

Parallax

1.344 mas

Total Proper Motion

29.042 mas/yr

PM Right Ascension

4.57 mas/yr

PM Declination

28.68 mas/yr

Galactic Cartesian (pc)

x = 0.318 · y = -0.584 · z = 0.747

Equatorial (J2000)

RA 298.55089° · Dec 48.33254°

Galactic ℓ, b

82.335° · 10.405°

Ecliptic λ, β

323.089° · 66.586°

HTM-20 index

1490443000

Wikipedia →

Similar Worlds

TOI-6303 b

Gas Giant · K-type orange

Radius 11.59 R⊕ · 496.5 ly

HATS-74 A b

Gas Giant · K-type orange

Radius 11.57 R⊕ · 976.5 ly

Wendelstein-1 b

Gas Giant · K-type orange

Radius 11.56 R⊕ · 995.8 ly

KPS-1 b

Gas Giant · K-type orange

Radius 11.55 R⊕ · 856.8 ly

WASP-91 b

Gas Giant · K-type orange

Radius 11.55 R⊕ · 489.0 ly

WASP-89 b

Gas Giant · K-type orange

Radius 11.66 R⊕ · 948.9 ly

Explore Related Categories

Gas Giant Planets Transit Discoveries Kepler Mission K-type orange Hosts Habitable-Zone Planets